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How strong is the Katago AI on the website?

The integrated Katago AI is the strongest open-source 囲碁 engine in the world, supporting multiple levels from beginner (Level 1) to Grandmaster (Level 10).

Can I play 囲碁 against the computer on my phone?

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Play 囲碁 vs AI Online - Free AI Match

Play 囲碁 online against powerful computer engines (Katago). Choose difficulty from beginner to grandmaster level.